Abstract:

This experiment took 478 single conidium as material which collected in 2006, 2007 and 2008. Magnaporthe oryzae pathotype of Heilongjiang had been classified by two sets of identification system, one was 12 differential hosts of Japan another was seven differential host of China. The results showed that predominant races were 77.7, 377.7, 737.5, 100, ZE1, ZG1and the high virulent races were 437, 777.7, 777.1, ZA9, ZA1, ZA13. The blast resistance of 63 imported rice resources had been identification according to predominant races& predominant races and 240 single conidium.The results showed that resistance spectrum of imported rice resources exceed 80% were G39, Jijing 88, Shennong 9903 which can be used widely. It is a simple and accurate way to identification the blast resistance of rice resource according to predominant races& predominant races..